Preparation method for antireflection film of solar cell

Abstract

The invention discloses a preparation method for an antireflection film of a solar cell. The preparation method comprises the following steps of forming a layered structure on substrate patterned glass by means of electrostatic adsorption effects of silica and a polystyrene sphere template; and removing the polystyrene sphere template by drying and tempering, and thus obtaining the silica antireflection film. The invention provides the preparation method for the antireflection film of the solar cell, which is low in cost and simple in process. A silica- polystyrene structure is formed due to the electrostatic adsorption between the silica and polystyrene spheres, and the silica is difficult to combine with moisture in air because of the hydrophobicity of the polystyrene spheres, so that the adhesion between the film and a substrate is improved. The silica film prepared by the preparation method has a porous structure, and the refractive index approaches to desirable refractive index, so that the light transmittance is enhanced and can go up to 95.4 percent. The photoelectric conversion efficiency of the solar cell is improved by increasing the light transmittance, and a certain promotion effect of popularizing the wide application of the solar cell is achieved.

Description

Technical field [0001] The invention relates to the field of solar cells, in particular to a method for preparing an anti-reflection film of a solar cell. Background technique [0002] Related research shows that the world's energy reserves such as coal and petroleum resources can only be used by humans for 50 to 70 years. Therefore, human beings are focusing more and more attention on the theoretically inexhaustible solar energy, making it one of the hot topics of research in recent decades. However, at present, how to narrow the gap between actual photoelectric conversion efficiency and theoretical photoelectric conversion efficiency and further improve the photoelectric conversion efficiency of solar cells is still a difficult problem facing mankind. [0003] The anti-reflection film is plated on the glass substrate of the solar cell in order to increase the transmittance of sunlight and increase the utilization rate of sunlight, so as to finally achieve the purpose of improvin...

AI Technical Summary

Problems solved by technology

The traditional method is to use the sol-gel method to prepare the silica anti-reflection film. The transmittance of the silica anti-reflection film prepared by this method does not increase significantly, and the transmittance of sunlight is below 93%, which is only better than that without anti-reflection coating. The light transmittance of the film is increased by 1%. In addition, because the surface of silicon dioxide contains a large number of hydroxyl groups, it is easy to absorb moisture in the air, which makes its adhesion to the glass substrate poor, thus affecting the anti-reflection performance of the film.